Journal
CARBON
Volume 44, Issue 11, Pages 2191-2195Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2006.03.006
Keywords
carbon nanotubes; carbon composites; thermal conductivity; Raman spectroscopy; scanning electron microscopy; atomic force microscopy
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We report a spontaneous ignition of carbon nanotubes/polyurethane composite under He-Ne laser. The ignition of the composite is caused by rapid increase of the temperature to at least 660 K due to absorption of light by carbon nanotubes. This temperature was estimated from G band downshift of the carbon nanotube caused due to the bond loosening due to thermal expansion of the bonds. The morphology of the nanocomposite under ignition was studied using SEM and optical microscopy, and revealed craters of dimension on the order of the focused laser beam. This unusual synergistic effect was hypothesized as the result of poor thermal conduction between carbon nanotube and polymer matrix. (C) 2006 Elsevier Ltd. All rights reserved.
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